I shoot a 97/22 with the standard chamber and it shoots thumb nail size groups at 25 yards and I cannot see much difference at 50 yards. The match cylinder is supposed to shrink groups about another tenth of an inch. If you are looking for supreme rifle like accuracy in a rimfire, a guy at FA said told me to get the large frame gun. He said the large frame guns are more accurate.
Needless to say, I dont have any experience with the 17s but I dont see any reason why they would not be a dandy gun.
Take Care,
Scott